New media playback UI.

LayoutTests/media/video-controls-mouse-events-captured.html

Index: LayoutTests/media/video-controls-mouse-events-captured.html
diff --git a/LayoutTests/media/video-controls-mouse-events-captured.html b/LayoutTests/media/video-controls-mouse-events-captured.html
index 215a8a5a302e9e64a3868d6b936dbefa362c51aa..20fce5338bb7b2e1091146217da1b0f170924ffa 100644
--- a/LayoutTests/media/video-controls-mouse-events-captured.html
+++ b/LayoutTests/media/video-controls-mouse-events-captured.html
@@ -45,13 +45,18 @@
                 eventSender.mouseUp();
                 eventSender.keyDown('A');
 
+                // The above positioned the slider under the mouse.  Click
+                // to begin a drag.
+                eventSender.mouseDown();

[philipj_slow, 2015/08/05 08:41:05]

Do you think it's worthwhile to test both with and without dragging? If it can
be done within this test it seems worth it to me, otherwise maybe not.

[liberato (no reviews please), 2015/08/05 16:36:40]

good idea.  done.

+
                 waitForEventAndFail("mousemove")
                 
-                // Check that the timeline also captures mousemove
+                // Check that the timeline also captures mousemove if the
+                // slider is being dragged.
                 eventSender.mouseMoveTo(coords[0]+10, coords[1]+10)
             }
         });
         video.src = findMediaFile("video", "content/test");
     </script>
 </body>
-</html>
+</html>